Hydraulic fluid

[Griz]

I have been using 10w40 in my T20 for years. I have been fixing up an 8N Ford. Fords call for universal transmission fluid. Why not use universal hydraulic fluid in the Ferguson transmission. Ford N models and Fergusons use the same rebuild kits for the hy-pumps. The pumps must be the same. What is the difference between Fords and Fergusons that require the use of 90wt or 15w40?
Thanks Griz

 

[John (UK)]

Don't use hydraulic fluid, it must be Transmission fluid. The hydraulics and the transmission use the same oil as you know, so you have to compromise between a thin oil for hydraulics and a thicker one for the Transmission and axle, so hydraulic oil is not the one to use. As for 10W/40 and 15W/40 it depends on how cold it gets where you live, the colder it gets the thinner the grade to give normal operation. I contacted Castrol Oil (BP) about this and they advised using 15W/40 anywhere in the USA instead of using the original GL1 Type oil as that is far to thick when cold and the newer oils provide much better lubrication qualities for the components. They advised using 10W/40 for Northern Canada and [email protected]

 

[phil(va)]

Probably you can use the Ford #134 Universal Fluid safely. However, it is bad about leaking past axle seals.

 

[Griz]

Thanks for the replies. I should have said Ford #134D Universal Fluid. Does it harm the drive system and hydraulics in any way?

If you want to have your mind boggled over lubricants try this site. http://www.bobistheoilguy.com/cms/

Thanks Griz

 

[phil(va)]

The New Holland dealers put the Ford 134D in the 9N tractors they service, so there should be no reason it would do any harm to a Fergie. As I said earlier, it is known to leak past axle seals more readily than some of the other options (my personal experience), but it should not harm anything else (other than your brakes if it leaks past the seals).

 

[Griz]

Couldn't leak more than it was. PTO,both axles and side covers are fixxed. Only the input shaft leaks now.